Oil-burning-furnace front



J. REID. on BURNING ru'RNA'cE FRONT.

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UNITED STATES JOHN REID, 0F NEW YORK, Nv. Y.

OIL-BURNING-FURNACE FRONT.

Specification of Letters Patent.

Application lei vApril 17,. 1920. Serial No. 374,770.

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Be it 'known that I, JOHN REID, a subject of the King of Great Britain,and residing at the city of New York, in the State of New York, in theUnited States of America,

have invented. a new and useful Oil-BurningfFurnace Front, of which thefollowing is the specification.

The invention relates 'to an oil burning furnace front as described inthe present specification and illustrated in the accompanying drawingsthat form part of the same.

The invention consists essentially in the novel construction andarrangement of parts -whereby the sweep of the stream. of air throughthe air pocket formed by the plates of the front is diverted in aflowing bend that effectually clears the corners and accelerates thedelivery. v

The objects of the invention are to materially promote the combustion ofthe fuel by insuring a good mixture; to facilitate the delivery of theair from both forced draft and natural draft4 sources; to economize inthe consumption of fuel and increase the steaming properties offurnaces, especially in marine installations; to assist materially incarrying out the proposals and generally improvethe constructions as setforth in the following applications for patents: Convertible furnacefront Serial Number 299,361 filed May 23rd, 1919, Serial Number `323,177

filed September 11th, 1919, Serial Number 334,355 filed October 29th,1919, Serial Number 315,904 filed August 7th, .1919, Serial Number345,396 filed December 16th, 1919, Serial Number 291,362 filed A ril19th, 1919, 'Serial Number 364,343 led March 8th, 1920, Serial Number364,342 filed March 8th, 1920, and the following) patents: Number1,321,555 dated Novem er 11th, 1919, Number 1,322,343 dated November18th, 1919, andl Number 1,297,247 dated March 11th, 1919; and generallyto p-rovide an efficient and serviceable' furnace front which mayreadily be converted to a coal burning furnace front withoutremoving themain parts from the furnace mouth.

In the drawings, Figure 1 is a front elevation of the backplate showingthe-.inter-- .mediate walls in section. f

vFig. 2 is a vertical sectional view` showing same construction of frontas illustrated in Fig. 1.

Fig. 3 isl a` front elevation of the back plate showmga slightlymodified form.

Fig.- 4 1s a vertical sectionalvview of a modified form also showing thenatural` draft effects.

Like numerals of reference indicate corresponding parts in the twogroups of figures respectively.

In this invention, it, will'be shown herein that it is desirable in themany forms of furnace fronts already developed by me to successfullycreate efiicient draft effects. One of the most important aimsthroughout the development of the inventions has been and is at thepresent the passage of the air through they air pocket formed by thefront and back plates and intermediate walls.

Inboth forced draft and natural draft, the tendency of the air inpassage is to accumulate and form pockets of dead air,

Patented Apr. 12, 1921,.

to the combustion chamber in either oil or coal burning furnaces, and'itisI toavoid any such happening that this invention has been made bydirecting the flow, so that a natural bend will be imparted to thestream of air through the internal arrangements of the front; the pocketis thoroughly swept and the air deliveredinthe most propitious mannerfor the furthering of the combustion. f

Referring to the drawings, the back plate -1 is shown 'in Fig. 1. withthe shield wall 2 projecting forwardly therefrom and having a central4port 3 closed by the valve 4 and a closed by the valve 7.

The front plate 8 completes the air pocket 9 and-from this air pocketthe flame opening 10 foran oil burning furnace, as this front primarilyis intended for, leads to the fireflare wall 5 surrounding the lowerportion of the front and forming the side port 6 boX. There is acorresponding opening 11 in the front plate as well as i a lower opening12. f

The opening 11 is covered by the closure plate 13, which is here shownas having the upper part hinged in the form of a natural draft door 14.

The lower opening 12 isf'closed by the natural draft door 15.

The back p latel also has a lower -opening 16, which is closed by theplate 17 under normal conditions.

.The baflie wall 18 extends between the front and back plates at theupper ends of the openings 10 and 1 1 and is formed with the ports 19through which in the forced draft arrangement, `a certain proportion .ofthe air reaches the flame area.

The oil pipe sleeve 20 is mounted in the closure plate 13 and extendsinwardly part way across the distance between the front and. back plates.and at the end carries the burner 21.

The spider 22 is mounted on the oil pipe sleeve 20 at the burner end andcarries at the end of its legs the air director 23.

This air director 23 is preferably in the form of a cone Shell 24 havingthe curved vanes 25 projecting outwardly therefrom forming the pluralityof air passages along the outer side of the shell frequently termedspiralized passages, though as in 'former inventions of mine mentionedin the foregoing these vanes may be perfectly straight. In any event'they project outwardly beyond the shell into proximity with "the llameopening 10. i i

The burner 21 is well within the cone shell 24 and therefore the spreadof the flame'occpies a considerable area beyond the flame opening, whichis the point where the air reaches it between the end of the cone shell,and the edge of the flame opening. i

The delivery ofthe air is further improved by the slight construction ofthe opening through the brick work 26 at 27, which corresponds to theVenturi tube ef-v fectso well known in furnace construction;

The openings 28 through the spider are closed by the cap 29 which is'adjustable along the sleeve 20 and operated by the rods 30 terminatingin the vhandles 31.

This -feature of the invention is most im-,

portant for not only is the creation of a vacuum avoided but facilitiesare provided 'by this cap for eliminating the choking o if of the flameat the burner mouth and the feed of air through the cone shell to theflame, veach at its proper time.

In Figs. 3 and 4 slight changes in the construction only, .are sho-wnand in this form of the invention side valves are omitted and the shieldwall 32 shown with the central port and valve 33 as in Fig. 1 and theflare wall also as in Fig. 1.

have the same opening as shown in'Figs. 1 and 2, but the closure plate37 is shown with the natural draft door 38 open to permit air to passthrough thefront plateV opening and also the natural draft door'39 opento permit air to pass through the lower opening.

-.The oil pipe sleeve 40 is mounted in the closure plate and extendsinwardly for part `of thee istance to the back plate and at its innerend carries the burner 41. f .v

The back plate 35 and thefront plate 36 the edge of the flame openingand by this means the air director 42 is rigidly supported quite clearof the oil pipe sleeve.

The inner vanes 46 project from' the interior wall to the cone shell 43and form passages therealong for the air, the vanes 46 being cut awayatthe entrance of the shell-for` the cone cap 47 to move into and closesaid entrance, this cone cap being op` erated by handles 49.

The baffle wall 50 vis precisely the same as the baille wall 18, asdescribed hereinbefore. It will be seen that in the operation of this`.invention that the usual course to take is to start the fire withnatural draft and by opening the natural draft doors in the closureplate and at the bottom, a stream of air flows in which takes a bendthat will the rods 48 terminating 1n the 'much facilitate the flowparticularly as "shown by the arrow through the opening in the frontplate.

The lower stream feeds much as usual until ,it comes to the airdirector, when the stream is 'bent to flow through the opening beyondthe cone shell and the back plates.

Justwas soon as the flame gets a fair start the cap-at the entrance ofthe cone shell maybe opened, this naturally increases the flow of air tothe flame, infact in the customary-Way of air streams, the heated airwill naturally expand as it enters the cone which are secured to theback plate 35 at shell, which as explained flares outwardly and as itflows on, 1't joins the stream of air flowing in from the outer side andboth reach the flame at the most satisfactory point for the bettermentof the condition surrounding -the combustion ofthe fuel.

This particular construction is as beforel explained most effective inthe direction of air but it also has material advantages in so farasgthestructural features are concerned merely because of conversion of afurnace. for coal burning purposes, for it will be readily understood'it 1s an easy matter to remove the closure plate and'o1l pipe sleevetherewith and when the air direc-l tor is mounted on the sleeve take itand the air director-olf at one time 'and when the air d1rector isbolted to the back plate simly'remove the bolts and take it away. The

uilding up. of the front then is a matter of l deta1l and' 1t 1s not atlall necessary to remove the main parts for the air shield wall andflare Wall may remain just the same though the side Valves are omitted.These must be installed for coal burning purposes. Also it may be saidthat the plainest construction has been shown in the drawings in regardto the frame of the front simply because any one of the sectional formsmay be used no matter in how many pieces or where joined for the resultswill be similar in regard to the direction of air with which thisparticular invention has more to do than with the actual building up ofthe main ed shall not be invalidated.

IVhat I claim is l. In an oil burning furnace front having front andback plates forming an air pocket, a closure for the front openingtosaid pocket, a burner supported from said closure and an air directorin cone shell form' flaring toward the flame opening and having outerand inner vanes forming passages in the direction of the outlet to thellame situated at the extremity of said shell.

2. In an oil burning furnace front'having front and back plates formingan air pocket, a closure for the front opening to said pocket, 'a burnersupported from said closure and an air director having outer vanesextending from the'inner open end of a shell body in the'direction ofthe edge of the flame opening and terminating in that vicinity andbeyond said shell body and inner vanes forming short passages to theflame opening within the Shell body.

3. In an oil burning furnace front having front and back plates formingan air pocket, a closure for the front opening to said pocket, a burnersupported from said closure and an air director having vanes from theouter side of a shell body extending to the flame opening and` rigidlysecured by brackets to the'back plate at the edge of said llame opening.

4. vIn an oil burning furnace front having front and back plates formingan air pocket,

a closure for the front opening to said pocket, a burner supported fromsaid closure and an air director formed on a cone shell body having itsinlet and smaller end surrounding the burner support and its outlet andlarger end surrounding the llame in the vicinity of the flame opening, aplurality of vanes projecting outwardly from the shell body and securedto the back plate and a closure for the cone inlet.

5. In an oil burning furnace front having front and back plates formingan air pocket, a closure for the front opening to said pocket, a burnersupported from said closure and an air director formed of a cone shellbody having its Vinlet end circling the burner support and rigidtherewith and its outlet end in the vicinity of the edge of the flameopening, vanes extending from the outside of said body and therebeyondat the larger end and a closure for the cone inlet.

6. In an oil burning furnace front having front and back plates formingan air pocket,

a closure for the front opening. to said` pocket, a burner supportedfrom said closure, an air director having an inlet into said shell andvanes in the outer side forming passages leading to the llame openingadjacent lto the edge thereof, and a spider rigidly mounted on theburner support and supporting said cone shell body at its smaller endand a cap in plate form closing the inlet to said. shell body and havingoperating rods and handles also secured thereto.

7 In an oil burning furnace front having front and back plates formingan air pocket, a closure for the front opening to 'said pocket, a burnersupported from said olosure, an air director having 1its body flaring inthe direction of the llame opening and an inlet end and vanes outsideand inside, and a cone cap fitting into said inlet end and having rodsand handles operable from the exterior of the front plate.

Signed at the city of New York, in 'the State of New York, in the UnitedStates of America, this 7 day ofvApril, 1920.

